Review on 🔧 Enhanced Denso 234-4138 Oxygen Sensor for Optimal Performance by William Santos

Fixed Check Engine Light on 2002 LandCruiser. The engine is now smoother than ever, has more power and uses less fuel. No, it's understandable. Replace both upstream sensors at the same time and only use similar OEMs. Easy replacement, the most difficult but still not difficult part is taking off the pig's tail. Use a good penetrating liquid like PB or the latest offering from Lucass. Wait at least an hour for the penetrating liquid to be absorbed. Use a 22mm or 7/8" box end wrench. Easiest O2 sensor replacement I've ever done and this is the third replacement this week.